Even though Abbey van der Plas, the owner of the animal shelter, tried to get Nala to perk up, she just sat in her cage.

"This girl arrived with us a few weeks ago. She had been wandering the streets for some time and was extremely shut down and terrified," van der Plas posted on Facebook. "I spent her entire first and second day sitting on the floor trying to gain her trust. I took hours and hours of footage trying to catch 'the moment' that she decided to trust me."

But Nala wasn't budging. So van der Plas brought Zach, her 7-year-old son, in to help.

What happens as soon as Nala sees Zach come into the room is truly incredible.